| Acronym | Definition |
|---|
| IGSA | IBM (International Business Machines Corporation) Global Services Australia |
| IGSA | Intergovernmental Service Agreement |
| IGSA | InterScan Gateway Security Appliance |
| IGSA | Indian Graduate Students Association |
| IGSA | International Gravity Sports Association |
| IGSA | Intergovernmental Support Agreement (various locations) |
| IGSA | Iranian Graduate Students' Association |
| IGSA | International Graduate Students Association |
| IGSA | Industrial Gas Suppliers Alliance |
| IGSA | Italian Genealogical Society of America (Peabody, MA) |
| IGSA | Italian Greyhound Safehouse Alliance (Germantown, TN) |
| IGSA | Idaho Grower Shippers Association |
| IGSA | Informatics Graduate Student Association |